Slab and floor



Sept. 24, 1940. Q RACKLE l 2,215,975

SLAB AND FLOOR Filed June 13, 1959 2 Sheets-Sheet 2.

INVENTOR George L. Raak'le 4 v ATTORNEYS Patented Sept. 24, 1940 SLABAND FLOOR George L. Rackle, Cleveland, Ohio,v assigner to The Geo.Rackle & Sons Go., Cleveland', Ohio,

a corporation of Ohio Application June 13, 1939, Serial No. 278,877

3 Claims.

This invention relates to an improved building slab and floor structure,an object of the invention being to provide an improved structure whichwill present a strong formation when built into a oor.

Another object of the invention is to provide a iloor slab which is of asize to be lreadi-ly handled and which is so formed that when placed inthe licor it is readily interlocked with adjacent slabs to form acomplete oor.

A further object of the invention is to provide an improved slab andfloor structure wherein the slabs are reinforced individually andgrouting as l well as reinforcing materials are arranged between therespective slabs to provide a proper connection between the slabs.

In the accompanying drawings- Fig. 1 is a sectional view through part ofa floor disclosing certain features of the invention;

Fig. 2 is a perspective view of part of one of the slabs shown in Fig.1, certain parts being broken away for illustrating the reinforcement;

Fig. 3 is a top plan view of part of the structure shown in Fig. 1,certain parts being broken away for illustrating certain vbonding andanchoring members; and

Fig. 4 is a sectional view through Fig. 3 approximately on the line 4 4.

Referring to the accompanying drawings by numerals, I indicates theflooring as a whole and 2 a slab. The slab- 2 may be of any desiredlength and also of any desired width. However, it has been found that adesired width for the slab is twenty-four inches while the depth isapproximately six inches at the sides and approximately two inches atthe center. A desired length for most uses is sixteen f eet. A slab ofthis size presents a unit designed to carry light house loads. While thedimensions given have proved satisfactory for many uses, it will beunderstood that the slab may be larger or smallerv without departingfrom the spirit of the invention.

As illustrated particularly in Figs. 1 and 2, the slab 2 is providedwith a center 3 which is flat and straight when properly cured and set.The upper surface is hard trowelled to provide a desired appearance andsurface. The center part 3 is preferably of the same thicknessthroughout and merges into depending edge members 4 and 5 which areidentical in construction. kA metalreinforcement 6 is provided for theslab,

said reinforcement including a loose Woven metal framework 'I and a pairof comparatively large strong bars 8 and 9 extending through the re`spective edge members 4 and 5. It will be understood,v of course, thatthe reinforcement 6 is placed in a suitable mold and concrete is castaround the same.k l 5 In forming the slab 2 `each longitudinal edge isprovided with an voffset IO whereby laterally contacting longitudinalbeads or extensions Il will. be presented. Also there is 'provided agroove I 2' in each of the offsets-I0. By this construction lfd when twoor more of the slabs are in use, as shown in. Fig. 1, the beads orextensions II come together but preferably 'a small layer of 4cement isarranged therebetween. ,v

When the: parts are arranged as shown in Fig.

1, grooves are presented in which suitable grouting material is placedthat acts to provide 'a suitable joint between the side edges of therespective slabs. If desired, a pipe I5 may be embedded in the groutingI4 for the reception of telephone 2O Wires or other articles asdesired.r Where the ends of two slabs 2 are supported by abeam I6, asshown in Fig. 4, a continuity rod or bar I1 ris positioned preferablycentrally of the grouting I 4, though if desired it could be arranged inone of the semi-circulargrooves I2. Byreason of the semi-circulargrooves I2, the grouting presents a strong key for locking the partstogether. Also, if desired, end anchoring membersy I8 could be provided.After the grouting I4 has been placed in position it is trowelled downsmoothly and evenly with the adjacent slabs so that arcontnuous evenflat floor will be provided.

As the slabs 2 are preferably comparatively narrow and comparativelyshort they may be readily handled by workmen and as they are preformed afew workmen may quickly lay or build a floor that will be strong andwill present a neat appearance. Inview of these facts it will readily beseen that the ease of handling and the simplicity of the structureresults in a low cost of production and at the same time presents afloor structure in which continuity bars may be placed as desired. Alsoby reason of the fact that the slabs may be grouted together alonglongitudinal lines, strains will `be readily conveyed to vadjoiningunits which result in presenting a strong oor with a minimum amount ofmaterial.r The respective slabs 2 are perfectly'straight and l true andthe upper surface of each slab is hard trowelled and the joining is rstgrouted and then pointed with any colored mortar and struck smooth as incase of Spanish floor tile. The re- 4 spective slabs will be slightlycambered or crowned when cast from one end to the center to compensatefor the shrinking of the grouting when it is thoroughly cured. When therespective units or slabs are cured they Will be straight and the oorwill be straight and fiat.

By reason of the construction presented if light-weight aggregate in thegrouting is used, the Weight is maintained at a minimum for a givenstrength of floor. Also by reason of the provision of the grouting notonly may the separate units be almost integrally connected but means areprovided for running wires through the center of the ceiling or acrossthe oor Without injuring the slabs.

I claim:

1. A concrete iioor slab, including a metallic reinforcement having a.foraminous at metal body and depending foraminous side Walls for thefull length of the body and a stiffening bar independent of and spacedfrom said foraminous body arranged adjacent the lower edge of each ofsaid side walls for the full length of the side Walls and a body ofconcrete embedding said reinforcement, said concrete body having asubstantially straight iiat central portion and a pair of depending sidemembers, the bars of the reinforcement being arranged in the lower partof s'aid depending side members, each of said depending side membersbeing formed with a rectangular longitudinally extending projection atVits lower edge and a longitudinally extending groove between theprojection and the surface of the slab in each depending side member.

2. A floor of the character described, including a plurality of slabsarranged side by side, each of said slabs being formed with notcheswhich form grout-receiving grooves when the slabs are arranged side byside, a supply of grouting material arranged in each of said grooves andcontinuity bars arranged in said grooves and embedded in said groutingmaterial, said continuity bars functioning to lock slabs together end toend While said grouting material functions to lock the respective slabstogether edge to edge.

3. A reinforced concrete floor slab including a concrete body and ametal reinforcement extending throughout said concrete body, said havingone of said bars embedded therein nearA its lower edge, each of saiddepending portions having a longitudinally extending offset, alongitudinally extending groove intermediate the height of the offset,and a rectangular bead extending laterally from the longitudinal edgewhereby when two slabs are placed in contact side by side said beadswill engage and the offsets of the respective slabs will form agroutreceiving recess.

GEORGE L. RACKLE.

